Battery module

Abstract

A battery module is provided with: battery cells comprising all-solid-state batteries having a positive electrode layer, a negative electrode layer, and a solid electrolyte layer; a support plate on which the battery cells are mounted; and a cooling medium channel through which a cooling medium for cooling the support plate flows, wherein electrode terminals are provided so as to project from one surface of the battery cells, bus bars capable of electrically connecting to the electrode terminals are provided on a battery cell mounting surface, the bus bars are in thermal contact with the support plate, and the battery cells are mounted on the support plate by causing one surface of the battery cells to face the cell mounting surface and electrically connecting the electrode terminals to the bus bars.

The invention claimed is: 
     
       1. A battery module comprising:
 battery cells that are all-solid-state batteries each having a positive electrode layer, a negative electrode layer, and a solid electrolyte layer; 
 a support plate on which the battery cells are mounted; and 
 a cooling medium channel through which a cooling medium for cooling the support plate flows, wherein 
 electrode terminals are provided to project from one surface of each of the battery cells to which a heat-transfer sheet is applied, 
 bus bars capable of electrically connecting to the electrode terminals are provided on a battery cell mounting surface, the battery cell mounting surface is a top surface of the support plate on which the battery cells are mounted, 
 the bus bars are disposed, via a second heat-transfer sheet, in bus bar accommodation recessed portions formed on the battery cell mounting surface and are in thermal contact with the support plate, and 
 the battery cells are mounted on the support plate by causing the one surface of each of the battery cells to face the battery cell mounting surface and electrically connecting the electrode terminals to the bus bars. 
 
     
     
       2. The battery module according to  claim 1 , wherein
 the bus bars each have electrode terminal insertion holes allowing for the electrode terminals to be inserted, and 
 the electrode terminals are removably secured to the electrode terminal insertion holes of the bus bars. 
 
     
     
       3. The battery module according to  claim 1 , wherein
 a positive-negative pair of the electrode terminals are provided to project downward from a bottom surface of each of the battery cells, and 
 the battery cell mounting surface is provided on a top surface of the support plate. 
 
     
     
       4. The battery module according to  claim 1 , wherein
 the battery cells each have a flat, rectangular parallelepiped shape, and 
 a plurality of the battery cells are arranged in parallel to each other in a thickness direction on the battery cell mounting surface. 
 
     
     
       5. The battery module according to  claim 1 , wherein the bus bar accommodation recessed portions have a depth of a size in which a thickness of the bus bars is added to a thickness of the second heat-transfer sheet. 
     
     
       6. The battery module according to  claim 1 , wherein the electrode terminals are provided in electrode terminal accommodation recessed portions formed on the battery cell mounting surface. 
     
     
       7. The battery module according to  claim 1 , wherein the support plate is non-electrically conducting, and the support plate and the bus bars are in direct contact with each other. 
     
     
       8. The battery module according to  claim 1 , wherein the support plate is sheet-shaped and has a constant thickness, the cooling medium channel has a constant thickness and forms a cavity so that the cooling medium can flow.